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双工器把每个接收和发射频带各分为两个225兆赫的频带,并由一个40兆赫的防护频带把上述两个信道分隔开来。接收双工器是一个4端装置,输入和输出各有2端。其中一个输入端接于高增益机械消旋天线,另一输入端接于低增益全向天线;两个输出端接于隧道二极管放大器。发射双工器是一个3端装置,一个是输出端,另两个是输入端。输出端接于上述的高增益天线,输入端则接到高电平的行波管上。
The duplexer divides each receive and transmit band into two 225 MHz bands and separates the two channels by a 40 MHz guard band. The receive duplexer is a 4-terminal device with 2 inputs and outputs each. One of the inputs is connected to a high-gain, mechanical, anti-whirling antenna and the other input is connected to a low-gain omni-directional antenna. Both outputs are connected to a tunneling diode amplifier. Transmitter duplexer is a 3-terminal device, one is the output, the other two are inputs. The output terminal is connected to the high-gain antenna, and the input terminal is connected to a traveling wave tube of high level.